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The FL-A1240 is the first in the new line of Automotive series batteries. Feather-Lite Batteries Automotive series batteries are specifically designed for your daily driver in mind. Whether its driven every day or your weekend toy, these series of batteries are what you want. With these batteries there is 1/29 the month loss of power compared to a conventional Lead-acid/AGM battery so no worries about not driving your car for a month only to decide you want to go for a cruise and the dreaded "CLICK...CLICK" of the dead battery. These batteries carry FLB Protection circuitry onboard to optimize charging and dis-charging with your alternator.


SKU: FL-A1240
  • Dimensions:

    Length 7.625” (193.7mm)

    Width 5.125” (130.2mm)

    Height 7.250” (184.15mm)

    Weight: 5.5 LBS (3.5kg)

    Polarity Configuration: Left side Positive


    Battery Energy Specifications:



         Nominal 12.8

         Charged 14.4


    Capacity: 40 Ah (Lead acid equivalent/ PbEq)

                    20 Lithium amp hours

                    88 minutes of Reserve Capacity


    Cranking amps: 600 CCA(Cold Cranking Amps 

                              800 @ 75 degrees Fahrenheit (for 15 seconds)

                              2400 Pulse Cranking amps


    Recommended Charger: : FL-BC1210 if used in in a total loss system that has longer charge times,

    Other Charger options FL-BC126 (These options are slower charger times)

  • FL-A1240 is a 12V 40ah designed as a daily driver battery uses the same materials to build a 12-volt replacement battery. This battery is 2nd to none, simply the best choice for every 12V automotive application on the market, and it was designed with FLB circuitry protection, for use with everyday alternators.


    Made with the safest, highest quality products available and encased in a high impact resistant plastic case, may not be exact size replacement for what you have, but that’s because we build Feather-Lite batteries to be compact not wasting any space.


    The FL-A1240 weighs in at 5.5 lbs. but compared to the competition this battery offers more cranking amps, more pulse cranking amps, and a lot more capacity. Its small stature brings it in at 7.625” long 5.125” wide 7.250” tall makes it slightly smaller version of a group 52 & 54. With 800 cranking amps (15 seconds) this battery has the fastest engine starting power every single time, This battery is more powerful than most the batteries on the BCI group list you would need 2 of every other battery on the market minimum to match that power and surpass our capacity, some companies you may need 3 or 4 of them.


    We designed and built these batteries from the cell design out, coping nothing on the market, lightest most powerful battery the customers needed and wanted. Feather-Lite Batteries can be mounted in any configuration, orientation, or location, can be wired in parallel or series configurations. Unlike sealed lead acid or AGM batteries the power and performance you get used to at the start, is what you can expect up to the end of the battery’s life cycle. You can also expect 4 times longer life expectancy than batteries of the same power specs in those technologies.

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